System class · No. 01
MCP Servers
Model Context Protocol servers that connect AI agents to tools, APIs, and data sources.
MCP servers implement the Model Context Protocol — a standard that lets AI agents reach external tools, APIs, and data through one consistent interface, instead of a bespoke integration per client. A server can connect to a database, a SaaS API, a filesystem, a browser, or an internal service. Choose by the actions it exposes, the data it can access, and its authentication, permissions, and rate limits. Check the publisher and documented support whether the server is first-party or community-maintained. Transport matters too: stdio servers run locally beside the client, while HTTP servers can run remotely and be shared across a team.
Review requested credentials and any ability to write data or execute code; use narrowly scoped access where supported. License terms, hosting costs and underlying API fees are separate checks. Recent commits show repository activity, not a security assessment or proof of ongoing support. Read release notes and security guidance, inspect the configuration, and start with a limited test before granting access to sensitive data or consequential actions.
Repository-listed tools
Stars measure repository interest. A public repository does not establish an open-source license, product quality or active users; check each record and its official documentation.
KiCAD MCP ServerMCP serverDesign printed circuit boards in KiCAD with Claude and other LLMs through natural language.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 2.7kGitHub starsMCP SuperAssistantMCP clientA Chrome extension that brings MCP tools to ChatGPT, Gemini, Perplexity, Grok, AI Studio and other web chats.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked 2.6kGitHub starsPerplexity MCP ServerMCP serverPerplexity's official MCP server for real-time web search, reasoning and research through its API.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 2.6kGitHub starsExcalidraw MCP Server (community)MCP serverA live Excalidraw canvas that agents can draw on, see, refine and export as .excalidraw files.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 2.5kGitHub starsMCPHubInfrastructureA self-hosted MCP gateway and control plane for connecting, routing and operating many MCP servers.Open sourceCosts not checkedTypeScript · recorded license: Apache-2.0Record checked · Recent push 2.5kGitHub starsx64dbg MCP ServerMCP serverA native x64dbg plugin that exposes the debugger to AI assistants over HTTP: breakpoints, stepping, memory and registers.Open sourceCosts not checkedZig · recorded license: MITRecord checked · Recent push 2.5kGitHub starsFigma Console MCPMCP serverTreat your design system as an API: extract, create and debug in Figma, with two-way token sync.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 2.5kGitHub starsTavily MCP ServerMCP serverTavily's MCP server for real-time web search, page extraction, site mapping and crawling.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 2.4kGitHub starsGemini MCP ToolMCP serverLet Claude Code and other assistants hand large files and codebases to the Gemini CLI for analysis.License not checkedFreeTypeScriptRecord checked 2.3kGitHub starsMCPJam InspectorInfrastructureAn open-source testing and evaluation platform for MCP servers, MCP apps and ChatGPT apps.License not checkedCosts not checkedTypeScriptRecord checked · Recent push 2.2kGitHub starsChatMCPMCP clientA cross-platform AI chat client implementing MCP, on desktop, mobile and the web.Open sourceCosts not checkedDart · recorded license: Apache-2.0Record checked · Recent push 2.2kGitHub starsiOS Simulator MCP ServerMCP serverLet AI assistants inspect and drive the iOS Simulator: tap, type, swipe and read the UI.Open sourceCosts not checkedJavaScript · recorded license: MITRecord checked 2.2kGitHub stars
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MCP Server for MySQLMCP serverLet Claude and other LLMs inspect MySQL schemas and run queries, read-only unless you opt in to writes.Open sourceCosts not checkedJavaScript · recorded license: MITRecord checked 2.2kGitHub starsSkybridgeSDK / libraryA full-stack, type-safe React framework for building MCP Apps and ChatGPT Apps.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 2.2kGitHub starsKubernetes MCP Server (containers)MCP serverA native Go MCP server for Kubernetes and OpenShift with generic resource CRUD and pod operations.Open sourceCosts not checkedGo · recorded license: Apache-2.0Record checked · Recent push 2.2kGitHub starsMCP Bundles (MCPB)InfrastructureA format and CLI for packaging local MCP servers as one-click installable bundles for desktop apps.License not checkedCosts not checkedTypeScriptRecord checked 2.1kGitHub starsAzure DevOps MCP ServerMCP serverMicrosoft's MCP server for Azure DevOps work items, repos, pipelines and more, hosted or local.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 2.1kGitHub starsWitsyMCP clientA desktop AI assistant and universal MCP client that runs MCP servers with almost any LLM.Open sourceCosts not checkedTypeScript · recorded license: AGPL-3.0Record checked 2.0kGitHub starsGitLab MCP Server (@zereight/mcp-gitlab)MCP serverA GitLab MCP server with 261 tools for projects, merge requests, issues, pipelines, wikis and releases.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 2.0kGitHub starsMCP Memory ServiceMCP serverSelf-hosted persistent memory for Claude and agent pipelines, over MCP, REST, OAuth and CLI.Open sourceCosts not checkedPython · recorded license: Apache-2.0Record checked · Recent push 2.0kGitHub starsMicrosoft Learn MCP ServerMCP serverOfficial remote MCP server that searches and fetches Microsoft Learn documentation and code samples.License not checkedCosts not checkedTypeScript · recorded license: CC-BY-4.0Record checked · Recent push 1.9kGitHub starsMCP UnityMCP serverA Unity Editor package and Node.js server that let Cursor, Claude Code and Codex act on Unity projects.Open sourceCosts not checkedC# · recorded license: MITRecord checked · Recent push 1.9kGitHub starsGoogle Search Console MCP (mcp-gsc)MCP serverAsk questions of your Google Search Console performance, indexing and URL inspection data.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 1.9kGitHub starsStripe MCP and AI toolkitMCP serverStripe's hosted MCP server plus SDKs and agent skills for building AI products on Stripe.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 1.9kGitHub starspg-aiguideMCP serverVersion-aware PostgreSQL manual search and best-practice skills that help AI tools write better Postgres code.Open sourceCosts not checkedPython · recorded license: Apache-2.0Record checked · Recent push 1.9kGitHub starsWordPress MCP AdapterMCP serverThe official WordPress package that turns Abilities API abilities into MCP tools, resources and prompts.Open sourceCosts not checkedPHP · recorded license: GPL-2.0Record checked · Recent push 1.8kGitHub starsDiveMCP clientAn open-source MCP host desktop app that works with any LLM supporting function calling.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked 1.8kGitHub starsTelegram MCPMCP serverRead chats, manage groups and send messages from a Telegram account through Claude, Cursor and other MCP clients.Open sourceCosts not checkedPython · recorded license: Apache-2.0Record checked · Recent push 1.8kGitHub starsGrounded Docs MCP ServerMCP serverA local, open-source index of version-specific library documentation for AI coding assistants.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 1.8kGitHub starsmcphub.nvimMCP clientAn MCP client for Neovim that seamlessly integrates MCP servers into your editing workflow with an intuitive interface for managing, testing, and using MCP servers with your favorite chat plugins.Open sourceCosts not checkedLua · recorded license: MITRecord checked 1.8kGitHub starsiMCPMCP serverA macOS menu bar app that gives Claude and other MCP clients access to Messages, Contacts, Reminders and more.Open sourceCosts not checkedSwift · recorded license: MITRecord checked · Recent push 1.7kGitHub starsMATLAB MCP ServerMCP serverMathWorks' official MCP server that lets coding agents start MATLAB, run code and check it.License not checkedFreeGoRecord checked · Recent push 1.6kGitHub starsMCP Tools (mcptools)InfrastructureA Swiss Army knife CLI for MCP servers: discover and call tools, open a shell, and run mock or proxy servers.Open sourceCosts not checkedGo · recorded license: MITRecord checked 1.6kGitHub starsmcp-remoteInfrastructureConnect MCP clients that only support local stdio servers to remote MCP servers, with OAuth support.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 1.6kGitHub starsMCP PHP SDK (official)SDK / libraryThe official PHP SDK for MCP servers and clients, from the PHP Foundation and Symfony.Open sourceCosts not checkedPHP · recorded license: MIT AND Apache-2.0Record checked · Recent push 1.6kGitHub starsMCP Server for WinDbgMCP serverAnalyse Windows crash dumps and debug user-mode or kernel targets in natural language via WinDbg.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 1.6kGitHub starsMCP Language ServerMCP serverRun a language server and expose definitions, references, diagnostics and renames to MCP clients.Open sourceCosts not checkedGo · recorded license: BSD-3-ClauseRecord checked 1.6kGitHub starsMCP Server KubernetesMCP serverManage a Kubernetes cluster, and optionally Helm releases, from an MCP client through your kubeconfig.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 1.6kGitHub starsDocker MCP GatewayInfrastructureThe docker mcp CLI plugin and gateway behind Docker Desktop's MCP Toolkit, for running MCP servers in containers.Open sourceCosts not checkedGo · recorded license: MITRecord checked · Recent push 1.6kGitHub starsMiniMax MCPMCP serverOfficial MCP server for MiniMax text-to-speech, voice cloning, image and video generation.Open sourceCosts not checkedPython · recorded license: MITRecord checked 1.6kGitHub starsQdrant MCP ServerMCP serverQdrant's official MCP server: store and retrieve semantic memories in a Qdrant vector database.Open sourceCosts not checkedPython · recorded license: Apache-2.0Record checked · Recent push 1.5kGitHub starsTerraform MCP ServerMCP serverHashiCorp's MCP server for the Terraform Registry and HCP Terraform or Terraform Enterprise workspaces.Open sourceCosts not checkedGo · recorded license: MPL-2.0Record checked · Recent push 1.5kGitHub starsMCP Swift SDK (official)SDK / libraryThe official Swift SDK for MCP clients and servers.Open sourceCosts not checkedSwift · recorded license: MIT AND Apache-2.0Record checked 1.5kGitHub starsROS MCP ServerMCP serverConnect Claude, GPT and Gemini to ROS robots for two-way control and observation without changing robot code.Open sourceCosts not checkedPython · recorded license: Apache-2.0Record checked · Recent push 1.5kGitHub starsBrave Search MCP ServerMCP serverBrave's official MCP server for web, news, image, video, local and place search plus summaries.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 1.5kGitHub starsDraw.io MCP Server (community)MCP serverA community MCP server for live diagramming in Draw.io, with a built-in editor or browser extension.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked · Recent push 1.5kGitHub starsMCP Kotlin SDK (official)SDK / libraryThe official Kotlin Multiplatform SDK for MCP, maintained with JetBrains.Open sourceCosts not checkedKotlin · recorded license: MIT AND Apache-2.0Record checked · Recent push 1.5kGitHub starsVoiceModeMCP serverNatural voice conversations with Claude Code and other MCP agents, with optional fully local speech.Open sourceCosts not checkedPython · recorded license: MITRecord checked · Recent push 1.4kGitHub starsMySQL MCP ServerMCP serverA Python MCP server for listing, reading and querying MySQL tables through a controlled interface.Open sourceCosts not checkedPython · recorded license: MITRecord checked 1.4kGitHub starsApple Docs MCPMCP serverSearch Apple Developer Documentation, framework APIs and WWDC videos from Claude, Cursor and other MCP clients.Open sourceCosts not checkedTypeScript · recorded license: MITRecord checked 1.4kGitHub stars
Frequently asked
- What is an MCP server?
- An MCP (Model Context Protocol) server exposes a tool, API, or data source to AI agents through a standard protocol, so any MCP-compatible client can use it without a custom integration.
- How do I choose an MCP server?
- Check the publisher, documented support, exposed actions, requested access and authentication. Recent commits are an activity signal; they do not establish security or suitability for your task.
- Are MCP servers free?
- Check each server's license and hosting terms separately from the underlying API or service. A free server can still require paid accounts, usage fees or compute.